#!/usr/bin/perl
# Emacs settings: -*- tab-width: 4 -*-
#
# File: installtool
#
# Abstract: Copy "ddnswriteconfig" to Application Support and make it setuid root.
#
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#
# Create the Bonjour subdirectory.
# Copy ARGV[0] to $dest and set owner and suid permissions.
#
# This script will be run as root by the AEWP trampoline.
#
use File::Temp qw/ :mktemp /;
$dest_dir = "/Library/Application Support/Bonjour";
$dest = $dest_dir . "/ddnswriteconfig";
$template = ".XXXXXX";
# Perl seems to think this code is running setuid root, so it applies its security checks.
# See .
# In fact this is NOT a setuid script. It is a normal unprivileged user-level script --
# but it is run as root when properly authorized by a user with an admin password,
# via the AuthorizationExecuteWithPrivileges() call.
# We therefore have to do this trick pattern match to 'untaint' the source file specified in $ARGV[0].
if ($ARGV[0] =~ /^(.+)$/) { $src = $1; }
# Also clear $ENV{PATH} so we don't get "Insecure $ENV{PATH}" fatal errors
$ENV{PATH} = "";
if (! -d $dest_dir) {
$dest_tmp_dir = mkdtemp ($dest_dir . $template);
(chown 0, 80, $dest_tmp_dir) or cleanup_dir();
(chmod 0755, $dest_tmp_dir) or cleanup_dir();
(rename $dest_tmp_dir, $dest_dir) or cleanup_dir();
}
$dest_tmp = mktemp ($dest . $template);
if ($src ne '') {
system ('/bin/cp', '-f', $src, $dest_tmp) and cleanup();
(chown 0, 80, $dest_tmp) or cleanup();
(chmod 04555, $dest_tmp) or cleanup();
(rename $dest_tmp, $dest) or cleanup();
}
exit (0);
sub cleanup {
unlink $dest_tmp;
exit (1);
}
sub cleanup_dir {
unlink $dest_tmp_dir;
exit (1);
}